Stc 50 Suspended Ceiling

An assembly rated at stc 50 will satisfy the building code requirement.

Stc 50 suspended ceiling. All too often this plenums and suspended ceilings unbaffled ducts window to window outdoors common heating units transoms and air grilles. Available in two sizes. Stc rating of 29 and fire rated astm e 84 class a. In 1961 stc was introduced as the method for comparing various wall ceiling floor door and window assemblies.

Two hour fire rated partition. Stc 50 lab test 3 tl 93 333 alternative stc 50 wall options. Ceiling attenuation a measurement of the ability of a ceiling panel to block the travel of sound from an enclosed room up into the plenum class cac and down to adjacent spaces. The safety of those armstrong acoustical ceiling products that do contain mineral wool has been confirmed through occupational studies of mineral wool workers which have been carried out for more than 50 years.

Installs by simply placing on top of existing ceiling tiles. 50 stc with single layer designs. In base layer and 1 5 8 2. One hour fire rated partition 3.

Fire rated floor ceiling assemblies using metal framing stc 50 iic 50 fire rating as shown 1. 24 x 48 tiles. Maximum with 1 5 8 41 mm type s drywall screws 8 203 mm o c. Drop ceiling tile sound barrier is made with foil faced mass loaded vinyl bonded to a scrim faced fiberglas.

24 x 24 tiles. One hour fire rated partition parallel to one side of min. 5 8 15 9 mm toughrock fireguard c gypsum board or 5 8 15 9 mm densarmor plus fireguard c gypsum panels applied perpendicular to i shaped wood joists or wood and steel trusses spaced 19 2 488 mm o c. Some armstrong ceilings contain mineral wool but they do not represent a health risk see below.

Ubc requirements for floor ceiling assemblies. The field test evaluates the dwelling s actual construction and includes all sound paths. 25 gauge metal studs 24 with 1 type s drywall screws 36 o c. Optimizing ceiling systems and lightweight plenum barriers to achieve ceiling attenuation class cac ratings of 40 45 and 50.

Test curve and the stc rating is heavily influenced by a measurement in one fre quency band. Stc ratings of 50 if tested in a laboratory or 45 if tested in the field. The standard requires a minimum laboratory stc rating of 50 for party walls and floor ceilings. Through base layer perpendicular to.